I just wanted to know what you think would be a better swap a LS2 OR 2JZ in to a FD and why? What are the up's and down's of each motor?

Any input would be good.

 

2jz cost me lots of time and money and aggrevasion and from what i hear the v-8 swaps are easy and less expensive plus u can add turbo's to that

 

LS2 & T56. Lighter, lower, positioned farther back in the chassis, plus you get 400 hp off of an un-stressed block with decent fuel economy, AND it'll be cheaper.

 

The 2jz easily has 400+ as well on an unstressed, unrestricted, block. But the bottom line is 2jz parts seem to be worth gold, LSx parts are cheaper by a mile. The 2jz is also a long engine so its going to be a tight fit and extend past the front axles almost guaranteed. The LSx's is shorter and help the car retain balance (but judging from your two engine choices I take it you're more interested in drag? If so balance probably doesn't matter to you)

 

well, balance still affects a drag car. The further forward weight is, the less will be over the drive wheels. All I meant by the unstressed thing was that the LS2 comes stock with 400, the 2jz was more like 320, im not doubting its ability to make that power, but it doesnt come with it

 

LS2 - no question about it.

Everyone that has already done a 2JZ swap, has had huge problems with bump steer! If you go 2JZ, it is a straight line car. Nothing else. If you go LS2, you can do anything a stock Rx7 can do, and more. You get twice the reliability, and double the torque! Your only problem is traction!

 

I would like it for drag and a little street fun with it.

I think im going to go for the LS2 swap.

Thanks for the info, it is really helping me decide on what I want.

 

*Cough20Bcough*


But seriously, I'd go with the LS2 and T56 combo, slap some L92 heads, long tube headers, intake manni on that sucker, and go. That alone would net about a 50-60hp gain over the stock 400hp. Plus, you can always turbo a V8 . STS makes rear mounted turbo kits that are VERY V8 friendly. The turbochargers replace your mufflers.

 

LS2 hands down man. Even if you dont want the t56 get a 4l60e tranny on there and youll be laughing.

 

Neither. They mysteriously wouldn't work if you put them in an FD.

 

nice theory you have there lol

 

I see a lot of rotarys with the same problem.

 

Some one need to make a custom ring and pinion for the FD, like a 3.27 final drive, so people who does the LSx and 2JZ swaps don't have to limit to only a 150-170mph race on the freeway... that is if you want freeway beast.

 

Why would you say something like that? If you're in the OEC forum to give advice, surely you've read some of the threads on how even the weight balance of an LSx swapped FD is. If you haven't, you shouldn't be giving advice.

Too expensive for too little gain.

The stock axles and differential housing are still weak points, so largely thanks to me, there are now several ways to swap an '03-'04 Cobra Mustang IRS into an FD, which offers a wide range of gearing choices, improved strength, and negligible weight gain, all for less than the cost of a custom ring and pinion set.

 

Nothing like a little modesty, right?

 

Gee, I sort of figured developing the cradle and axles to make it possible earned me the right.







Do some research before running your mouth next time.

 

I'm also thinking of doing the LSx swap....you guys know any good shop to do the swap or place to buy the engine??

 

jimlab-- did you fix the issues with the cradle from breaking? i thought you stopped making them....oh how badly i want a LSX FD with the cobra IRS..mmmm

 

One of the first production cradles bent at the notch made for more exhaust clearance, so patches were sent out for the existing cradles and subsequent cradles had no exhaust notch. No one ever "broke" a cradle, although the drifter who bent that one "on the way to the grocery store" definitely tried.

I did, because it wasn't worth the effort. There are now several other people making variations on my original design.

 

whats w/ the avatar jimlab?

 

^^^ It's ironic/satirical/sacrcastic...That is to say: it's JimLab.

 

i wasnt knocking the design or workmanship on the cradle or anything, it looks like a really good piece, and if i went into engineering-mode id have a ton of questions on it and the suspension setup around it, but i've seen a bunch of threads where you mention it and always add at the end "that I helped develop" or some permutation.

 

Some of the lounge idiots started calling me "snuggles" because A) they thought it would bother me, and B) I'm so sensitive of other people's feelings. One day I just decided to prove how little I cared.

 

No permutations.

I did all the research on what was currently available and what could be adapted to the FD's suspension without affecting handling, wheel, or brake choices, paid for all of the R&D, found a manufacturer to make the 300M hybrid axles to my specifications, and made the welding jig to produce copies for others.

 

ive never seen a 2jz in a 7 before, does anyone have pics.